Airbag device, method for controlling airbag device, and vehicle

Abstract

The invention discloses a safety air bag device, a control method of the safety air bag device and a vehicle. The safety air bag device comprises a first cavity, a second cavity and a blocking piece assembly. A communication channel is arranged between the first chamber and the second chamber. The blocking piece assembly is located in the first cavity and comprises a blocking piece body and a drawstring assembly connected with the blocking piece body. In the first operation mode, the drawstring assembly is released, and the blocking piece body blocks the communicating channel; the first chamber is separated from the second chamber, and only the first chamber is opened; in the second operation mode, the drawstring assembly is fixed, the drawstring assembly applies pulling force to the separation blade body, and at least part of the separation blade body deviates from the communication channel; and the first chamber and the second chamber are communicated and are opened.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and particularly to an airbag device. The present application also relates to a control method for such an airbag device, and a vehicle. Background Art

[0002] Automobiles are usually equipped with airbags. When a vehicle collision occurs, the airbag of the airbag will immediately inflate and expand to protect the occupants sitting on the seat.

[0003] In some automobiles, the seat can provide multiple sitting postures for the occupants to obtain a more comfortable riding experience. According to different sitting postures, the distance between the occupant and the airbag is different, and even the distance between the occupant and the airbag is relatively far. In this case, the airbag is usually equipped with a pull belt, and the pull belt is used to make the airbag have different volumes after inflation to adapt to the different distances between the occupant and the airbag. For example, in a first case where the distance between the occupant and the airbag is small, when the airbag inflates, the pull belt is tightened to constrain the airbag to have a small first opening volume. In a second case where the distance between the occupant and the airbag is large, when the airbag inflates, the pull belt is loosened or broken, and the airbag is not constrained and expands to have a larger second opening volume. However, in the above first case, the pull belt may be broken due to excessive air pressure in the airbag, resulting in over-expansion of the airbag and even possible injury to the occupant. Summary of the Invention

[0004] In view of the above technical problems, a first aspect of the present application provides an airbag device. The airbag device includes a first chamber, a second chamber outside the first chamber, and a baffle assembly. A communication channel is provided between the first chamber and the second chamber. The baffle assembly is located in the first chamber and includes a baffle body and a pull belt assembly; a first end of the pull belt assembly is connected to the baffle body, and a second end is adapted to be released or fixed so that the baffle body is adapted to block or conduct the communication channel. In a first operation mode, the second end of the pull belt assembly is released, and the baffle body blocks the communication channel; the first chamber and the second chamber are separated, and only the first chamber expands; in a second operation mode, the second end of the pull belt assembly is fixed; the baffle body is pulled by the pull belt assembly, and at least a part of the baffle body deviates from the communication channel, and the communication channel is conducted; the first chamber and the second chamber communicate and both expand.

[0005] In one embodiment, the airbag device further includes: an airbag body that defines an inflation space; and at least one partition that is located in the inflation space and is connected to the airbag body to divide the inflation space into a first chamber and a second chamber; a first interface serving as the communication channel is formed on the partition.

[0006] In one embodiment, the airbag body includes a first airbag for forming a first chamber and a second airbag for forming a second chamber; the first airbag includes a mounting area serving as a separating sheet; the second airbag is configured with at least one second interface; the second airbag is outside the first airbag and mounted on the mounting area, and the second interface is docked with the first interface together.

[0007] In one embodiment, the airbag device further includes a first connection structure, and the first interface is within the range defined by the first connection structure; in the first operation mode, the first connection structure remains intact to connect the flap body to the separating sheet; in the second operation mode, the first connection structure is damaged, and at least part of the flap body leaves the separating sheet and deviates from the first interface.

[0008] In one embodiment, the first connection structure is disposed along the edge of the first interface.

[0009] In one embodiment, the airbag device further includes a second connection structure; in the first operation mode, the second connection structure remains intact and connects the wall of the second chamber to the separating sheet; in the second operation mode, the second connection structure is damaged.

[0010] In one embodiment, the second connection structure is further configured that in the first operation mode, the second connection structure remains intact and the wall of the second chamber and the flap body are connected to the separating sheet, and in the second operation mode, the second connection structure is damaged.

[0011] In one embodiment, the airbag device further includes a third connection structure deviating from the first interface. In the first operation mode and the second operation mode, the third connection structure remains intact and connects the flap body and the separating sheet together.

[0012] In one embodiment, the flap body includes a first edge portion and a second edge portion opposite to the first edge portion; the third connection structure is disposed along the first edge portion; the first end of the pull - belt assembly is connected to the second edge portion.

[0013] In one embodiment, the third connection structure is disposed in the middle of the flap body to divide the flap body into two sub - flap bodies; the number of the first interfaces is at least two and corresponds to the two sub - flap bodies respectively; the pull - belt assembly includes two first ends, and the two first ends are respectively connected to the two sub - flap bodies.

[0014] In one embodiment, the elongation rate of the flap body is equal to that of the separating sheet.

[0015] In one embodiment, the airbag device further comprises an activation mechanism, and the second end of the drawstring assembly is adapted to be connected to the activation mechanism. In a first operating mode, the activation mechanism is actuated to release the second end of the drawstring assembly; in a second operating mode, the activation mechanism is not actuated to fix the second end of the drawstring assembly.

[0016] In one embodiment, the drawstring assembly includes: a first drawstring connected to the baffle body; and a second drawstring, a first end of the second drawstring connected to the first drawstring and a second end connected to the activation mechanism.

[0017] In one embodiment, the drawstring assembly includes a plurality of first drawstrings; and a first end of the second drawstring is connected to the plurality of first drawstrings.

[0018] The second aspect of the present application proposes a control method for an airbag device. The airbag device includes a first chamber, a second chamber outside the first chamber, and a baffle assembly; a connecting passage is provided between the first chamber and the second chamber; the baffle assembly is in the first chamber and includes a baffle body and a drawstring assembly; the first end of the drawstring assembly is connected to the baffle body, and the second end is suitable for being released or fixed. The control method includes: obtaining the distance between the occupant and the airbag device; judging whether the distance is greater than a preset distance; if not, the second end of the drawstring assembly is released, and the baffle body blocks the connecting passage; the first chamber and the second chamber are separated, and only the first chamber is opened; if yes, the second end of the drawstring assembly is fixed, and the baffle body is pulled by the drawstring assembly so that at least part of the baffle body deviates from the connecting passage, and the connecting passage is connected; the first chamber and the second chamber are connected and both are opened.

[0019] A third aspect of the present application provides a vehicle, which includes the safety airbag device described above.

[0020] The beneficial effects of the present application are as follows: According to the airbag device of the present application, the baffle assembly can selectively make the first chamber and the second chamber disconnected or connected, so as to realize that only the first chamber is opened, or both the first chamber and the second chamber are opened according to the different distances between the occupant and the airbag device. In this way, the airbag device can protect the occupants at different distances from the airbag device. In addition, in the airbag device of the present application, when the distance between the occupant and the airbag device is small (i.e., in the first operating mode), the baffle assembly blocks the connecting passage from the inside of the first chamber. The greater the air pressure of the first airbag, the tighter the baffle assembly blocks the connecting passage, so that the gas cannot leak from the first chamber into the second chamber, which helps to avoid the first chamber and the second chamber being inflated and opened in the first operating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By way of non-limiting examples of exemplary embodiments of the present application, the present application will be further described based on multiple drawings in the following detailed description. The drawings are not drawn to actual scale.

[0022] Figure 1 Schematically shows a vehicle according to an embodiment of the present application.

[0023] Figure 2 Schematically shows an airbag device according to an embodiment of the present application.

[0024] Figure 3a Schematically shows the airbag body of the first embodiment, where the airbag body is inflated and has a second inflated volume.

[0025] Figure 3b Schematically shows the structure of the airbag body of the second embodiment.

[0026] Figure 4 Schematically shows Figure 3a The exploded view of the shown airbag body.

[0027] Figure 5 Schematically shows a flap assembly according to an embodiment, where the second pull strap is omitted.

[0028] Figure 6a Schematically shows the setting manner of the flap assembly in the airbag device of the first embodiment.

[0029] Figure 6b Schematically shows the setting manner of the flap assembly in the airbag device of the second embodiment.

[0030] Figure 6c Schematically shows the setting manner of the flap assembly in the airbag device of the third embodiment.

[0031] Figure 7 Schematically shows the setting manner of the flap assembly in the airbag device in other embodiments.

[0032] Figure 8 Schematically shows the cut piece drawing of the first airbag, in which the flap assembly is shown.

[0033] Figure 9 Schematically shows the cut piece drawing of the second airbag.

[0034] Figure 10 Schematically shows the airbag device of the first embodiment, where the airbag body has a first inflated volume.

[0035] Figure 11Schematically shows an airbag device of a first embodiment, wherein the airbag body has a second deployment volume.

[0036] Figure 12 Schematically shows an airbag device of a second embodiment, wherein the airbag body has a first deployment volume.

[0037] Figure 13 Schematically shows an airbag device of a second embodiment, wherein the airbag body has a second deployment volume.

[0038] Figure 14 Schematically shows an airbag device of a third embodiment, wherein the airbag body has a first deployment volume.

[0039] Figure 15 Schematically shows an airbag device of a third embodiment, wherein the airbag body has a second deployment volume.

[0040] Figure 16 Schematically shows an airbag device of a fourth embodiment, wherein the airbag body has a first deployment volume.

[0041] Figure 17 Schematically shows an airbag device of a fourth embodiment, wherein the airbag body has a second deployment volume.

[0042] Figure 18 Schematically shows an airbag device of a fifth embodiment, wherein the airbag body has a first deployment volume.

[0043] Figure 19 Schematically shows an airbag device of a fifth embodiment, wherein the airbag body has a second deployment volume.

[0044] Figure 20 Schematically shows a flowchart of a control method for an airbag device.

[0045] Figure 21 Schematically shows the deployment state of the airbag body when the distance between the occupant and the airbag device is small.

[0046] Figure 22 Schematically shows the deployment state of the airbag body when the distance between the occupant and the airbag device is large.

[0047] List of reference numerals 1 Vehicle 10 Seat 11 Instrument panel assembly 12 Occupant 2 Airbag device 201 First chamber 202 Second chamber 3 airbag body 301 First connection structure 302 Second connection structure 303 Third connection structure 304 Fourth connection structure 305 Fifth connection mechanism 31 First airbag 310 Partition piece 311 First interface 313 Air inlet 314 Edge part 317 First main piece 318 First side piece 32 Second airbag 321 Second interface 327 Second main piece 328 Second side piece 4 Bearing assembly 410 Housing 411 Bottom wall 420 Gas generator 430 Activation mechanism 5 Flap assembly 51 Flap body 511 First edge part 512 Second edge part 513 Sub-piece body 52 Pulling belt assembly 521 First end of the pulling belt assembly 522 Second end of the pulling belt assembly 523 First pulling belt 524 Second pulling belt Detailed implementation manners

[0048] The details introduced here are exemplary and are only used for an illustrative discussion of the embodiments of the present application. Their existence is to provide what is considered to be the most useful and easily understood description of the principles and concepts of the present application. In this regard, no attempt is made here to introduce the structural details of the present application beyond the level required for a basic understanding of the present application. Those skilled in the art can clearly understand how to implement several forms of the present application in practice through the description and its accompanying drawings.

[0049] Figure 1 Vehicle 1 according to an embodiment of the present application is schematically shown. As Figure 1 shown, vehicle 1 includes a seat 10 and an instrument panel assembly 11 adjacent to the seat 10. An airbag device 2 is provided in the instrument panel assembly 11. When vehicle 1 collides, the airbag body 3 of the airbag device 2 will inflate and expand and pop out from within the instrument panel assembly 11 to protect the occupant 12 (as Figure 19 and Figure 20As shown). It should be understood that the airbag device 2 can also be installed at other positions within the vehicle 1, such as on the steering wheel, etc. For simplicity, in this application, the airbag device 2 provided within the instrument panel assembly 11 is taken as an example to describe the technical solution of this application.

[0050] Next, the airbag device 2 will be described.

[0051] The airbag device 2 includes an airbag body 3, a separator 310 connected to the airbag body 3, and a flap assembly 5 that cooperates with the separator 310.

[0052] Figure 3a and Figure 4 The airbag body 3 of the first embodiment is shown. The airbag body 3 includes a first airbag 31 and a second airbag 32 outside the first airbag 31. The first airbag 31 defines a first chamber 201, and the second airbag 32 defines a second chamber 202. Specifically, as Figure 4 shown, the first airbag 31 includes an installation area for the separator 310, and the second airbag 32 is installed on the separator 310 (or, the first airbag 31).

[0053] A first interface 311 is formed on the separator 310, and a second interface 321 is formed on the second airbag 32. After the second airbag 32 is installed on the separator 310, the second interface 321 is docked with the first interface 311, and the first interface 311 forms a communication channel between the first airbag 31 and the second airbag 32.

[0054] Figure 3b The structure of the airbag body 3 of the second embodiment is schematically shown. As Figure 3b shown, the airbag device 2 includes an airbag body 3 and a separator 310. The airbag body 3 is an integral component and defines an inflation space. The separator 310 is located within the inflation space and is connected to the airbag body 3 to divide the inflation space into a first chamber 201 and a second chamber 202. In this case, a first interface 311 serving as a communication channel is formed on the separator 310. Overall, the airbag body 3 and the separator 310 are formed separately and then assembled together.

[0055] As Figure 5 shown, the flap assembly 5 includes a flap body 51 and a pull - strap assembly 52. In the initial state (i.e., the state where the installed airbag device 2 is not in use), the flap body 51 is disposed on the separator 310 and blocks the first interface 311. The first end 521 of the pull - strap assembly 52 is connected to the flap body 51, and the second end 522 is adapted to be released or fixed so that the flap body 51 is adapted to block or conduct the first interface 311 (i.e., the above - mentioned communication channel).

[0056] The airbag device 2 of the present application has a first operation mode. As Figure 19 shown, when the distance between the occupant 12 and the airbag device 2 is small (for example, the inclination angle of the seat back relative to the direction perpendicular to the ground is small, so that the distance between the occupant and the airbag device 2 is small), the airbag device 2 is in the first operation mode. In this first operation mode, when the vehicle 1 collides, the second end 522 of the strap assembly is released, so that the strap assembly 52 is in a free state in the first airbag 31 and does not apply a pulling force to the flap body 51. In this way, the flap body 51 is connected to the partition 310 and seals the first interface 311, so that the first airbag 31 is separated from the second airbag 32. The first airbag 31 is inflated, and the gas cannot flow from the first airbag 31 into the second airbag 32. Overall, only the first airbag 31 opens, so that the airbag body 3 has a relatively small first opening volume, thereby protecting the occupant. Moreover, during this process, the greater the air pressure in the first airbag 31, the better the sealing effect of the flap body 51 on the first interface 311, and the less likely the gas is to enter the second airbag 32 from the first airbag 31, thus effectively avoiding excessive opening of the airbag body 3.

[0057] The airbag device 2 of the present application also has a second operation mode. As Figure 20 shown, compared with the occupant 12 shown by the solid line, when the distance between the occupant 12 shown by the dashed line and the airbag device 2 is large (for example, the inclination angle of the seat back relative to the direction perpendicular to the ground is large, so that the distance between the occupant 12 and the airbag device 2 is large), the airbag device 2 is in the second operation mode. In this second operation mode, when the vehicle 1 collides, the second end 522 of the strap assembly 52 is fixed. As the first airbag 31 inflates and opens, the strap assembly 52 gradually tightens to pull at least a part of the flap body 51 off the partition 310 and away from the first interface 311. The gas filled into the first airbag 31 enters the second airbag 32 through the first interface 311 (i.e., the communication channel). Overall, both the first airbag 31 and the second airbag 32 open, so that the airbag body 3 has a second opening volume greater than the first opening volume, thereby protecting the occupant. Moreover, during this process, the greater the air pressure in the first airbag 31, the greater the pulling force of the pulling assembly 52 on the flap body 51, and the easier it is to pull at least a part of the flap body 51 off the first airbag 31 to conduct the communication channel.

[0058] It can be seen from this that according to the airbag device 2 of the present application, when the vehicle 1 collides, the flap assembly 5 causes the first airbag 31 (i.e., the first chamber) and the second airbag 32 (i.e., the second chamber) to be connected or disconnected based on the different distances between the occupant 12 and the airbag device 2. Thus, the volume of the inflated airbag body 3 also varies based on the different distances between the occupant 12 and the airbag device 2, so as to protect the occupants at different distances from the airbag device 2 (or the instrument panel assembly 11), and can also protect the occupants with different sitting postures. It should be noted that the sizes of the first inflated volume and the second inflated volume can be determined according to the actual situation and will not be elaborated here.

[0059] In one embodiment, as Figure 4 shown, the area of the second interface 321 of the second airbag 32 is larger than the area of the first interface 311 of the first airbag 31. In this way, when the second airbag 32 is arranged on the partition 310, the first interface 311 is within the range of the second interface 321. This helps to prevent the gas in the first airbag 31 from leaking outside the airbag body 3 in the second operation mode. In one embodiment, the shape of the first interface 311 can be any suitable shape such as circular, oval, polygonal, etc., which is not limited here. The same is true for the second interface 321.

[0060] In one embodiment, as Figure 2 shown, the airbag device 2 further includes a carrying assembly 4 for carrying the airbag body 3. In one embodiment, the carrying assembly 4 includes a housing 410 and two gas generators 420 mounted on the housing 410. The airbag body 3 is folded and arranged in the housing 410. Two air inlets 313 (as Figure 8 shown) are formed on the first airbag 31 for connecting the two gas generators 420 with the first airbag 31, so as to facilitate the inflation of the airbag body 3 by using the gas generators 420. In one embodiment, in the first operation mode, only one gas generator 420 inflates the airbag body 3; in the second operation mode, the two gas generators 420 inflate the airbag body 3 simultaneously. It should be understood that other numbers of gas generators 420 can also be set, and the types of the gas generators 420 are not limited and will not be elaborated here.

[0061] Optionally, also as Figure 2As shown, the bearing assembly 4 also includes an activation mechanism 430 arranged on the bottom wall 411 of the shell 410. The activation mechanism 430 is connected to the second end 522 of the drawstring assembly 52. ​​In the first operating mode, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, so that the baffle body 51 blocks the first interface 31, and the communication channel is cut off. In the second operating mode, the activation mechanism 430 is not actuated to fix the second end 522 of the drawstring assembly 52, so that at least part of the baffle body 51 is pulled down from the first air bag 31 by the drawstring assembly 52 and deviates from the first interface 31, and the communication channel is connected. The activation mechanism 430 is well known to those skilled in the art and will not be repeated here. It should be understood that the activation mechanism 430 can also be set at other positions of the shell 410 according to actual conditions.

[0062] Next, an air bag device according to a first embodiment will be described.

[0063] The airbag device is equipped with the airbag body of the first embodiment. Figure 6a As shown, the baffle body 51 is generally rectangular. In the initial state and the first operation mode of the airbag device, the first connection structure 301 fixes the baffle body 51 on the separator 310 and blocks the first interface 311. In the second operation mode, the first connection structure 301 is destroyed, so that the baffle assembly 51 deviates from the first interface 311 (which will be described in detail below). It should be noted that, in addition, the baffle body 51 can also be other appropriate shapes, such as circular, elliptical or other polygonal shapes, etc., which are not limited here. The shape of the first interface 311 is also not limited in this application.

[0064] Also like Figure 6a As shown, the first connection structure 301 is arranged around the edge of the first interface 311, so as to ensure that the baffle body 51 blocks the first interface 311. In addition, when manufacturing the airbag body 3, the first interface 311 also provides a positioning standard for the setting of the first connection structure 301, which facilitates the manufacturing of the airbag body 3. It should be understood that, according to actual conditions, there may be an appropriate gap between the first connection structure 301 and the edge of the first interface 311, which is not limited here. In other embodiments, the first connection structure 301 may also be arranged in any other direction, as long as it deviates from the first interface 311, which will not be repeated here.

[0065] The first connection structure 301 is a suture stitching structure, that is, the baffle assembly 5 is sutured to the separator 310 by sutures. In other embodiments, the first connection structure 301 can also be a bonding structure or a welding structure. For convenience, in this application, the first connection structure 301 is described as a suture stitching structure as an example.

[0066] The second airbag 32 is fixedly connected to the first airbag 31 through the fourth connection structure 304. For example, the fourth connection structure 304 is arranged to be generally along the second interface 321, and the first connection structure 301 is within the range defined by the fourth connection structure 304. In the first operation mode and the second operation mode, the fourth connection structure 304 remains intact to stably connect the second airbag 32 to the first airbag 31. The fourth connection structure 304 is similar in form to the first connection structure 301, which will not be elaborated here.

[0067] Also as Figure 6a and Figure 10 shown, the airbag device 2 further includes a second connection structure 302. In the initial state and the first operation mode of the airbag device, after being folded, the second airbag 32 is connected to the first airbag 31 through the second connection structure 302 to pre-fix the second airbag 32, and the second connection structure 302 also connects the flap body 51. In one embodiment, the second connection structure 302 is between the first connection structure 301 and the fourth connection structure 304, so that the second connection structure 302 connects both the second airbag 32 and the flap body 51 to the partition 310 (as Figure 10 shown). When transporting or assembling the airbag device 2, the second airbag 32 is fixed in a neat folded state by the second connection structure 302 and will not come apart, which facilitates transportation and the assembly operation of the operator. It should be understood that in the first operation mode, the second connection structure 302 remains intact; however, in the second operation mode, the second connection structure 302 is damaged.

[0068] In one embodiment, the second connection structure 302 is also a suture structure, and the suture stitches both the second airbag 32 and the flap body 51 to the first airbag 31. Of course, the second connection structure 302 can also be an adhesive structure or a welding structure, which will not be elaborated here.

[0069] In one embodiment, the connection strength of the second connection structure 302 is less than or equal to the connection strength of the first connection structure 301 to ensure that when the first connection structure 301 is damaged, the second connection structure 302 is also damaged. Of course, the connection strength of the second connection structure 302 may also be greater than the connection strength of the first connection structure 301, as long as it is ensured that in the second operation mode, both the first connection structure 301 and the second connection structure 302 are damaged.

[0070] Also as Figure 6a 、 Figure 10 and Figure 11As shown, the drawstring assembly 52 includes a first drawstring 523 and a second drawstring 524 connected to the first drawstring 523. The first drawstring 523 is connected to the baffle body 51, for example, connected to the top corner of the baffle body 5 (so that the end of the first drawstring 523 connected to the baffle body 51 forms the first end 521 of the drawstring assembly 52). The first end of the second drawstring 524 is connected to the first drawstring 523, and the second end is connected to the activation mechanism 430, and the second end of the second drawstring 524 is controlled by the activation mechanism 430 to be fixed or released (so that the second end of the second drawstring 524 forms the second end 522 of the drawstring assembly 52). Generally, the activation mechanism 430 has specific requirements for the drawstring assembled thereon. According to the solution of the present application, it is only necessary to select the second drawstring 524 to be compatible with the activation mechanism 430, which facilitates the manufacture of the airbag device 2. Of course, the first drawstring 523 can also be directly connected to the activation mechanism 430 according to actual conditions, so that the second drawstring 524 is not needed.

[0071] In the first operating mode, as Figure 10 As shown, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, so that the drawstring assembly 52 (i.e., the first drawstring 523 and the second drawstring 524) is in a free state in the first air bag 31, and no pulling force is applied to the baffle body 51, and the first connection structure 301 and the second connection structure 302 are not damaged. The baffle body 51 is connected to the partition sheet 310 and blocks the first interface 311. The gas generator 420 inflates the first air bag 31, and the gas cannot flow from the first air bag 31 into the second air bag 32. From the overall point of view, only the first air bag 31 is opened, so that the air bag body 3 has a first opening volume.

[0072] In the second operating mode, if Figure 11 As shown, the activation mechanism 430 is not actuated and fixes the second end 522 of the drawstring assembly 52. ​​The gas generator 420 inflates the first airbag 31. As the first airbag 31 is inflated and opened, the drawstring assembly 52 is gradually tightened and applies tension to the baffle body 51 and destroys the first connection structure 301 and the second connection structure 302, thereby pulling the baffle body 51 off the separator 310, and the first interface 311 is connected. The first interface 311 in the first airbag 31 is connected to the second airbag 32. Overall, the first airbag 31 and the second airbag 32 are both opened, so that the airbag body 3 has a second open volume.

[0073] In one embodiment, the elongation rate of the flap body 51 is the same as that of the partition sheet 310 (or the first airbag 31). In this way, the flap body 51 can be conveniently pulled off from the partition sheet 310 (or the first airbag 31) in the second operation mode. In one embodiment, the flap body 51 and the partition sheet 310 (or the first airbag 31) are made of the same material (such as nylon or polyester fabric). It should be understood that the elongation rate of the flap body 51 being the same as that of the partition sheet 310 does not mean equal in the mathematical sense. In fact, there can be a slight difference between the two, as long as it does not affect the quick pulling of the flap body 51 from the partition sheet 310.

[0074] Next, the airbag device of the second embodiment will be described.

[0075] The airbag device of the second embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the first embodiment. The differences between the two will be mainly described below. As Figure 6b shown, the airbag device 2 further includes a third connection structure 303, and the third connection structure 303 is also used to connect the flap body 51 and the partition sheet 310. The third connection structure 303 is located in the middle of the flap body 51 and is offset from the first interface 311 and the first connection structure 301. Overall, the flap body 51 includes two sub - sheet bodies 513 on both sides of the third connection structure 303. In this case, the number of the first pull - straps 523 is two, and the two first pull - straps 523 are respectively connected to the corresponding sub - sheet bodies 513.

[0076] The third connection structure 303 is similar to the first connection structure 301. For example, it can be a suture stitching structure. However, the connection strength of the third connection structure 303 is greater than that of the first connection structure 301.

[0077] Also as Figure 6b shown, the number of the first interfaces 311 is six and they are evenly distributed on both sides of the third connection structure 303. Each sub - sheet body 513 is adapted to cover or deviate from the corresponding three first interfaces 311. Of course, other numbers of first interfaces 311 can also be set, which will not be elaborated here.

[0078] In the first operation mode, as Figure 12 shown, the activation mechanism 430 is actuated and releases the second end 522 of the pull - strap assembly 52. The pull - strap assembly 52 is in a free state within the first airbag 31, and the first connection structure 301, the second connection structure 302, and the third connection structure 303 are not damaged. The flap main body 51 is connected to the partition sheet 310 and seals the first interfaces 311. The gas generator 420 inflates the first airbag 31, and the gas cannot flow from the first airbag 31 into the second airbag 32. Finally, only the first airbag 31 expands, so that the airbag body 3 has a first expansion volume.

[0079] In the second operation mode, as Figure 13 shown, the activation mechanism 430 is not actuated and fixes the second end 522 of the pull - belt assembly 52. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and expands, the pull - belt assembly 52 exerts a pulling force on the flap body 51 and breaks the first connection structure 301 and the second connection structure 302, but the third connection structure 303 is not broken and still connects the flap body 51 to the partition piece 310. In this way, the two sub - body parts 513 deviate from the corresponding first interfaces 311, making the first interfaces 311 conductive. The gas in the first airbag 31 enters the second airbag 32 through the first interfaces 311. Finally, both the first airbag 31 and the second airbag 32 expand, so that the airbag body 3 has a second expanded volume.

[0080] In addition, in the second operation mode, the third connection structure 303 and the pull - belt assembly 52 play a constraining role on the flap body 51, preventing the flap body 51 from moving freely in the first airbag 31 and blocking the first interfaces 311.

[0081] Next, the airbag device of the third embodiment will be described.

[0082] The airbag device of the third embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the second embodiment. The differences between the two will be mainly described below. As Figure 6c shown, the flap body 51 includes a first edge portion 511 and a second edge portion 512 opposite to the first edge portion 511. For example, the flap body 51 is rectangular, and the first edge portion 511 and the second edge portion 512 are two opposite edges of the rectangle. The third connection structure 303 is disposed near the second edge portion 512 of the flap main body 51 and deviates from the first interfaces 311 and the first connection structure 301. The pull - belt assembly 52 only includes a first pull - belt 523, and the two ends of the first pull - belt 523 are respectively connected to the first edge portion 511 and the activation mechanism 430 (that is, the first end 521 of the pull - belt assembly 52 is connected to the first edge portion 511, and the second end 522 is connected to the activation mechanism 430).

[0083] In the first operation mode, as Figure 14 shown, the activation mechanism 430 is actuated to release the second end 522 of the pull - belt assembly 52. The pull - belt assembly 52 is in a free state in the first airbag 31, and the first connection structure 301, the second connection structure 302, and the third connection structure 303 are not broken. The flap main body 51 is connected to the partition piece 310 and blocks the first interfaces 311. The gas generator 420 inflates the first airbag 31, and the gas cannot flow from the first airbag 31 into the second airbag 32. Finally, only the first airbag 31 expands, so that the airbag body 3 has a first expanded volume.

[0084] In the second operation mode, as Figure 15 shown, the activation mechanism 430 is not actuated and the second end 522 of the strap assembly 52 is fixed. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and expands, the strap assembly 52 exerts a pulling force on the flap body 51 and breaks the first connection structure 301 and the second connection structure 302, but the third connection structure 303 is not broken and still connects the flap body 51 to the partition 310. In this way, the flap body 51 deviates from the first interface 311, making the first interface 311 conductive. The gas in the first airbag 31 enters the second airbag 32 through the first interface 311. Finally, both the first airbag 31 and the second airbag 32 expand, making the airbag body 3 have a second expanded volume.

[0085] Similar to the flap assembly of the second embodiment, in the second operation mode, the third connection structure 303 and the strap assembly 52 of the flap assembly of the third embodiment play a constraining role on the flap body 51 to prevent the flap body 51 from moving freely in the first airbag 31 and blocking the first interface 311.

[0086] Next, the airbag device of the fourth embodiment will be described.

[0087] The airbag device of the fourth embodiment is equipped with the airbag body of the first embodiment and is similar to the airbag device of the first embodiment. Only the differences between the two will be described below. As Figure 16 shown, in the initial state and the first operation mode of the airbag device, the second airbag 32 is folded and pre-connected to the partition 310 (or the first airbag 31) through the second connection structure 302. It should be noted that the second connection structure 302 is not connected to the flap body 51.

[0088] In the first operation mode, as Figure 16 shown, the activation mechanism 430 is actuated to release the second end 522 of the strap assembly 52. The strap assembly 52 is in a free state in the first airbag 31, and the first connection structure 301 and the second connection structure 302 are not broken. The flap body 51 is connected to the partition 310 and blocks the first interface 311. The gas generator 420 inflates the first airbag 31, and the gas cannot flow from the first airbag 31 into the second airbag 32. Finally, only the first airbag 31 expands, making the airbag body 3 have a first expanded volume.

[0089] In the second operation mode, as Figure 17As shown, the activation mechanism 430 is not actuated and fixes the second end 522 of the drawstring assembly 52. ​​The gas generator 420 inflates the first airbag 31. As the first airbag 31 is inflated and opened, the drawstring assembly 52 applies a pulling force to the baffle body 51 and destroys the first connection structure 301, thereby pulling the baffle body 51 off the separator 310, and the first interface 311 is turned on. The gas in the first airbag 31 enters the second airbag 32 through the first interface 311, and the air pressure in the second airbag 32 increases and destroys the second connection structure 302. Finally, the first airbag 31 and the second airbag 32 are both opened, so that the airbag body 3 has a second opening volume.

[0090] Next, an air bag device according to a fifth embodiment will be described.

[0091] like Figure 18 As shown, the airbag device of the fifth embodiment is equipped with the airbag body of the second embodiment. The airbag body 3 is an integrated component, and the separator 310 is located in the inflation space defined by the airbag body 3 as an independent component and is fixedly connected to the airbag body 3 through the fifth connecting structure 305. In this way, the separator 310 divides the inflation space into a first chamber 201 and a second chamber 202. The first interface 311 is constructed on the separator 310. It should be noted that in the first operating mode and the second operating mode, the fifth connecting structure 305 remains intact to stably connect the separator 310 to the first airbag 31. In addition, the fifth connecting structure 305 is similar in form to the first connecting structure 301, which will not be repeated here. The other structures of the airbag device of the fifth embodiment are similar to those of the airbag device of the second embodiment, which will not be repeated here.

[0092] In the first operating mode, as Figure 18 As shown, the activation mechanism 430 is actuated to release the second end 522 of the drawstring assembly 52, so that the drawstring assembly 52 is in a free state in the first air bag 31, and no pulling force is applied to the baffle body 51, and the first connection structure 301, the second connection structure 302 and the third connection structure 303 are not damaged. The baffle body 51 is connected to the partition sheet 310 and blocks the first interface 311. The gas generator 420 inflates the first air bag 31, and the gas cannot flow from the first air bag 31 into the second air bag 32. From the overall point of view, only the first air bag 31 is opened, so that the air bag body 3 has a first opening volume.

[0093] In the second operating mode, if Figure 19As shown, the activation mechanism 430 is not actuated and fixes the second end 522 of the lanyard assembly 52. The gas generator 420 inflates the first airbag 31. As the first airbag 31 inflates and expands, the lanyard assembly 52 exerts a pulling force on the flap body 51 and breaks the first connection structure 301 and the second connection structure 302, but the third connection structure 303 is not broken and still connects the flap body 51 to the separator 310. In this way, the two sub-flap bodies 513 deviate from the corresponding first interfaces 311, making the first interfaces 311 conductive. The gas in the first airbag 31 enters the second airbag 32 through the first interfaces 311. Finally, both the first airbag 31 and the second airbag 32 expand, causing the airbag body 3 to have a second expanded volume.

[0094] It should also be understood that in other embodiments, in the airbag device, only the first connection structure 301 may be provided. The first connection structure 301 connects the flap body 51 to the separator 310, or connects the flap body 51 and the second airbag 32 to the separator 310 at the same time; only the second connection structure 302 (as Figure 7 shown) may be provided. The second connection structure 302 connects the flap body 51 to the separator 310, or connects the flap body 51 and the second airbag 32 to the separator 310 at the same time; only the second connection structure 302 and the third connection structure 303 may be provided. The third connection structure 303 connects the flap body 51 to the separator 310, and the second connection structure 302 connects the flap body 51 to the separator 310, or connects the flap body 51 and the second airbag 32 to the separator 310 at the same time; only the first connection structure 301 and the third connection structure 303 may be provided. The third connection structure 303 connects the flap body 51 to the separator 310, and the first connection structure 301 connects the flap body 51 to the separator 310, or connects the flap body 51 and the second airbag 32 to the separator 310 at the same time. The working processes of these airbag devices are similar to that of the airbag device in the first embodiment and will not be elaborated here.

[0095] Next, the manufacturing process of the airbag body 3 of the airbag device in the second embodiment will be described.

[0096] As Figure 5 shown, a flap assembly 5 is provided. The flap body 51 of the flap assembly 5 is generally rectangular and has opposite first edge portions 511 and second edge portions 512. The lanyard assembly 52 of the flap assembly 5 includes two first lanyards 523 and one second lanyard 524. Two ends of one first lanyard 521 are connected to two ends of the first edge portion 511 of the flap body 51, and the other first lanyard 521 is connected to two ends of the second edge portion 512 of the flap body 51. The second lanyard 524 is connected to the two first lanyards 523 (as Figure 6bas shown

[0097] As Figure 8 shown, when manufacturing the first airbag 31, first, a first main piece 317 and two first side pieces 318 are provided. The first main piece 317 is generally strip-shaped (for example, generally rectangular) and defines a mounting portion (i.e., the partition piece 310); the first main piece 317 also has edge portions 314 on both sides of the partition piece 310 along the length direction of the first main piece 317. Six first interfaces 311 are formed in the partition piece 310, and two air inlets 313 are formed in one edge portion 314. Then, the flap body 51 is disposed on the inner side surface of the first main piece 317 and corresponds to the partition piece 310 to cover the first interfaces 311. First connection structures 301 are disposed along the edges of each first interface 311, and a third connection structure 303 is disposed in the middle of the flap body 5. In this way, the flap body 51 is connected to the partition piece 310 through the first connection structures 301 and the third connection structure 303; the first edge portion 511 and the second edge portion 512 of the flap body 51 are on both sides of the third connection structure 303, and three first interfaces 311 are distributed on each side of the third connection structure 303. Then, the two first side pieces 318 are respectively sewn to the two longitudinal edges (i.e., the length edges) of the first main piece 317, and the two width edges of the first main piece 317 are butted and sewn together, thereby forming the first airbag 31 as shown in Figure 4 . The flap assembly 5 is inside the first airbag 31. It should be noted that, for simplicity, the second pull strap 524 is not shown in Figure 8 .

[0098] As Figure 9 shown, when manufacturing the second airbag 32, first, a second main piece 327 and two second side pieces 328 are provided. The second main piece 327 is generally strip-shaped (for example, generally rectangular). Then, the two second side pieces 328 are respectively sewn to the two length edges of the second main piece 327; and the two width edges of the second main piece 327 remain separated. Thereby forming the second airbag 32 as shown in Figure 4 , and the second airbag 32 has a second interface 321.

[0099] Next, the second airbag 32 is installed on the partition piece 310 of the first airbag 31 through a fourth connection structure 304, and the second interface 321 is docked with the first airbag 31. In this way, the airbag body 3 is manufactured and completed.

[0100] Optionally, after the second airbag 32 is installed on the first airbag 31, the second airbag 32 is folded. Then, a second connection structure 302 is provided to pre-fix the second airbag 32 to the separator 310, thereby holding the second airbag 32 in the folded state. The second connection structure 302 also connects the flap body 51 and the separator 310 together.

[0101] It should be understood that the manufacturing process of the airbag body of the remaining airbag devices is similar to the process described above and will not be elaborated here.

[0102] Figure 20 A flowchart schematically showing the control method of the airbag device is shown. As described above, the airbag device includes a first chamber, a second chamber outside the first chamber, and a flap assembly. A communication channel is provided between the first chamber and the second chamber. The flap assembly is located in the first chamber and includes a flap body and a pull strap assembly. The first end of the pull strap assembly is connected to the flap body, and the second end is adapted to be released or fixed.

[0103] Also as Figure 20 shown, the control method includes the following steps.

[0104] Step 1: Obtain the distance between the occupant 12 and the airbag device 2.

[0105] Step 2: Determine whether the distance is greater than a preset distance.

[0106] In step 2, if the judgment result is negative, it means that the distance between the occupant 12 and the airbag device 2 is small. When the vehicle 1 collides, the activation structure 430 of the control device of the vehicle 1 is actuated to release the second end 522 of the pull strap assembly 52, and the gas generator 420 is instructed to generate gas to inflate the first airbag 31. The flap body 51 blocks the communication channel, and the gas cannot flow from the first airbag 31 into the second airbag 32. Finally, only the first airbag 31 opens, so that the airbag body 3 has a first opening volume (as Figure 19 shown).

[0107] In step 2, if the judgment result is positive, it means that the distance between the occupant 12 and the airbag device 2 is large. When the vehicle 1 collides, the activation structure 430 of the control device of the vehicle 1 is not actuated to fix the second end 522 of the pull strap assembly 52, and the gas generator 420 is instructed to inflate the first airbag 31. The pull strap assembly 52 is tightened and applies a pulling force to the flap body 51 to pull at least part of the flap body 51 away from the communication channel. The gas in the first airbag 31 flows from the first airbag 31 into the second airbag 32 through the communication channel. Finally, both the first airbag 31 and the second airbag 32 open, so that the airbag body 3 has a second opening volume (as Figure 20 shown).

[0108] In one embodiment, a sensor is provided in the vehicle 1 to obtain the distance between the occupant 12 and the airbag device 2 described in step one. This is also easily achievable by those skilled in the art and will not be elaborated here.

[0109] In one embodiment, the control method may further include other steps before step one. For example, the step may include: obtaining the state of the vehicle 1, and then determining whether the vehicle 1 is about to collide. If not, return to continue obtaining the state of the vehicle 1. If so, further determine whether there is a member on the seat 10. If it is determined that there is no occupant, control the airbag device 2 to have no operation. If it is determined that there is an occupant, obtain the distance between the occupant 12 and the airbag device 2 (i.e., the above step one), and then proceed to step two. It should be understood that these other steps are all easily achievable by those skilled in the art and will not be elaborated here.

[0110] It should be noted that the present invention (such as the inventive concept, etc.) has been described and / or illustrated in the specification of this patent document according to exemplary embodiments; the embodiments of the present invention are presented by way of example only and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the inventive concept embodied in the present invention as described in the specification and / or illustrated in the drawings are merely illustrative. Although the exemplary embodiments of the present invention have been described in detail in this patent document, those of ordinary skill in the art can easily understand that equivalents, modifications, variations, etc. of the subject matter of the exemplary embodiments and alternative embodiments are possible and are considered to be within the scope of the present invention; all such subject matter (such as modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various / other modifications, variations, substitutions, equivalents, changes, omissions, etc. can be made in the configuration and / or arrangement of the exemplary embodiments (such as in terms of concept, design, structure, device, form, assembly, construction, means, function, system, process / method, steps, order of process / method steps, operation, operating conditions, performance, materials, composition, combination, etc.) without departing from the scope of the present invention; all such subject matter (such as modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. The scope of the present invention is not intended to be limited to the subject matter described in the specification and / or drawings of this patent document (such as details, structure, function, materials, behavior, steps, order, system, results, etc.). Considering that the claims of this patent document will be appropriately interpreted to cover the full scope of the subject matter of the present invention (such as including any and all such modifications, variations, embodiments, combinations, equivalents, etc.); it should be understood that the terms used in this patent document are for the purpose of describing the subject matter of the exemplary embodiments and not as a limitation on the scope of the present invention.

[0111] It should also be noted that, according to the exemplary embodiments, the present invention may include conventional technologies (such as technologies implemented and / or integrated in the exemplary embodiments, modifications, variations, combinations, equivalents), or may include any other applicable technologies (present and / or future), having the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All such technologies (such as technologies implemented in the form of embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.

Claims

1. An airbag device, characterized in that, Comprising: A first chamber; A second chamber outside the first chamber, with a communication channel provided between the first chamber and the second chamber; And A baffle assembly, the baffle assembly being within the first chamber and including a baffle body and a pull - strap assembly; a first end of the pull - strap assembly is connected to the baffle body, and a second end is adapted to be released or fixed so that the baffle body is adapted to block or conduct the communication channel; Wherein, in a first operating mode, the second end of the pull - strap assembly is released, and the baffle body blocks the communication channel; the first chamber and the second chamber are separated, and only the first chamber expands; In a second operating mode, the second end of the pull - strap assembly is fixed; the baffle body is pulled by the pull - strap assembly, at least a part of the baffle body deviates from the communication channel, and the communication channel is conducted; the first chamber and the second chamber are in communication and both expand.

2. The airbag device according to claim 1, characterized in that, The airbag device further includes: An airbag body that defines an inflation space; and At least one partition, the partition being within the inflation space and connected to the airbag body to divide the inflation space into the first chamber and the second chamber; a first interface serving as the communication channel is formed on the partition.

3. The airbag device according to claim 2, characterized in that, The airbag body includes a first airbag for forming the first chamber and a second airbag for forming the second chamber; The first airbag includes an installation area serving as the partition; the second airbag is provided with at least one second interface; the second airbag is outside the first airbag and is installed on the installation area, and the second interface is docked with the first interface.

4. The airbag device according to claim 2, characterized in that, The airbag device further includes a first connection structure, and the first interface is within the range defined by the first connection structure; in the first operating mode, the first connection structure remains intact to connect the baffle body to the partition; In the second operating mode, the first connection structure is damaged, and at least a part of the baffle body leaves the partition and deviates from the first interface.

5. The airbag device according to claim 4, characterized in that, The first connection structure is arranged along the edge of the first interface.

6. The airbag device according to claim 2, characterized in that, The airbag device further includes a second connection structure; in the first operating mode, the second connection structure remains intact and connects the wall of the second chamber to the partition; in the second operating mode, the second connection structure is damaged.

7. The airbag device according to claim 6, characterized in that, The second connection structure is further configured to: in the first operating mode, the second connection structure remains intact and connects the wall of the second chamber and the baffle body to the partition; In the second operating mode, the second connection structure is damaged.

8. The airbag device according to claim 2, characterized in that, The airbag device further includes a third connection structure that deviates from the first interface; In the first operating mode and the second operating mode, the third connection structure remains intact and connects the baffle body and the partition together.

9. The airbag device according to claim 8, characterized in that, The baffle body includes a first edge portion and a second edge portion opposite to the first edge portion; The third connection structure is arranged along the first edge portion; and the first end of the drawstring assembly is connected to the second edge portion.

10. The airbag device according to claim 8, characterized in that, The third connection structure is arranged in the middle of the baffle body to divide the baffle body into two sub-pieces; the number of the first interfaces is at least two and they correspond to the two sub-pieces respectively; The drawstring assembly includes two first ends, and the two first ends are connected to two sub-sheet bodies respectively.

11. The airbag device according to claim 2, characterized in that, The elongation rate of the baffle body is equal to the elongation rate of the partition sheet.

12. The airbag device according to claim 1, characterized in that, The airbag device further comprises an activation mechanism, and the second end of the drawstring assembly is adapted to be connected to the activation mechanism; In the first operating mode, the activation mechanism is actuated to release the second end of the drawstring assembly; In the second operating mode, the activation mechanism is not actuated to secure the second end of the drawstring assembly.

13. The airbag device according to claim 12, characterized in that, The drawstring assembly comprises: A first drawstring connected to the baffle body; and A second drawstring, wherein a first end of the second drawstring is connected to the first drawstring, and a second end of the second drawstring is suitable for being connected to the activation mechanism.

14. The airbag device according to claim 13, characterized in that, The drawstring assembly includes a plurality of the first drawstrings; and a first end of the second drawstring is connected to the plurality of the first drawstrings.

15. A control method for an airbag device, characterized in that, The airbag device comprises a first chamber, a second chamber outside the first chamber, and a baffle assembly; a communication passage is provided between the first chamber and the second chamber; the baffle assembly is located in the first chamber and comprises a baffle body and a drawstring assembly; a first end of the drawstring assembly is connected to the baffle body, and a second end is suitable for being released or fixed; The control method comprises: obtaining a distance between an occupant and the airbag device; Determine whether the distance is greater than a preset distance; if not, the second end of the drawstring assembly is released, and the baffle body blocks the connecting passage; the first chamber and the second chamber are separated, and only the first chamber is opened; if yes, the second end of the drawstring assembly is fixed, the baffle body is pulled by the drawstring assembly, and at least part of the baffle body deviates from the connecting passage, and the connecting passage is connected; the first chamber and the second chamber are connected and both are opened.

16. A vehicle, characterized in that, Comprising the airbag device according to any one of claims 1 to 14.

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